Specify texture format

Is there anyway to specify that image format of a texture?

In normal webgl we can create a luminance texture like this:
```javascript
gl.texImage2D(
gl.TEXTURE_2D,
0, // level
gl.LUMINANCE, // internal format
numPoints, // width
1, // height
0, // border
gl.LUMINANCE, // format
gl.UNSIGNED_BYTE, // type
null
);
```

But the only options I see for texture uniforms is interpolation and wrap:
```typescript
type TextureOptions = {
interpolation: Interpolation,
wrap: [WrapMode, WrapMode] | WrapMode,
};
```
Is there somewhere else to specify this?